Peter K Fionn said

"Just underlying Richard Bridge's point about the "fantasy of the era" Jerry Lee Lewis married his 13-year-old cousin and his career hardly faltered"

That is a truly amazing thing to say!

His career took an - almost - total nose dive!
After he left Britain "in disgrace" his chart successes totally dried up and it wasn't until four years later that he had another hit.
And even that was a minor hit.
It was similar story in the States.
Indeed, it took Jerry Lee until the late 60s to really establish himself as a major artist again, and then as a country music star.